there are 2 main methods of transport in London: the Underground and the buses. Buses are best for sightseeing, especially double-decker buses. However, they are rather slow, especially during the rush hour. On the traditional double-decker there were no doors and passengers leaped up and off the bus and conductor was moving about and collecting fares from the passengers. However, nowadays fares are given directly to the driver or to the machine. Moreover, London transport has recently introduced single-decker buses which are called "Red Arrows".
